Earthquakes and Structures

  • 제9권3호
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  • Pages.603-623
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  • 2015
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Retrofitting of vulnerable RC structures by base isolation technique

  • Islam, A.B.M. Saiful (Department of Civil Engineering, University of Malaya) ;
  • Jumaat, Mohd Zamin (Department of Civil Engineering, University of Malaya) ;
  • Ahmmad, Rasel (Department of Civil Engineering, University of Malaya) ;
  • Darain, Kh. Mahfuz ud (Department of Civil Engineering, University of Malaya)
  • 투고 : 2013.10.09
  • 심사 : 2015.04.06
  • 발행 : 2015.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

The scale and nature of the recent earthquakes in the world and the related earthquake disaster index coerce the concerned community to become anxious about it. Therefore, it is crucial that seismic lateral load effect will be appropriately considered in structural design. Application of seismic isolation system stands as a consistent alternative against this hazard. The objective of the study is to evaluate the structural and economic feasibility of reinforced concrete (RC) buildings with base isolation located in medium risk seismic region. Linear and nonlinear dynamic analyses as well as linear static analysis under site-specific bi-directional seismic excitation have been carried out for both fixed based (FB) and base isolated (BI) buildings in the present study. The superstructure and base of buildings are modeled in a 3D finite element model by consistent mass approach having six degrees of freedom at each node. The floor slabs are simulated as rigid diaphragms. Lead rubber bearing (LRB) and High damping rubber bearing (HDRB) are used as isolation device. Change of structural behaviors and savings in construction costing are evaluated. The study shows that for low to medium rise buildings, isolators can reduce muscular amount of base shears, base moments and floor accelerations for building at soft to medium stiff soil. Allowable higher horizontal displacement induces structural flexibility. Though incorporating isolator increases the outlay, overall structural cost may be reduced. The application of base isolation system confirms a potential to be used as a viable solution in economic building design.

키워드

과제정보

연구 과제 주관 기관 : University of Malaya (UM), Bangladesh Earthquake Society

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피인용 문헌

  1. Base Isolation for Seismic Retrofitting of a Multiple Building Structure: Design, Construction, and Assessment vol.2017, 2017, https://doi.org/10.1155/2017/4645834
  2. The effect of base isolation and tuned mass dampers on the seismic response of RC high-rise buildings considering soil-structure interaction vol.17, pp.4, 2015, https://doi.org/10.12989/eas.2019.17.4.425